In the history of nuclear chemistry, who is generally given credit for the discovery and systematic study of transuranic elements (elements beyond uranium in the periodic table)?

Difficulty: Easy

Correct Answer: Seaborg

Explanation:


Introduction / Context:
Transuranic elements are those with atomic numbers greater than that of uranium (greater than 92). They do not occur in significant amounts in nature and are typically synthesized in nuclear reactors or particle accelerators. The systematic discovery and organisation of many of these elements was a major achievement in twentieth century nuclear chemistry. Questions like this one ask you to connect the name of a key scientist with pioneering work on transuranic elements.


Given Data / Assumptions:

  • The scientists listed are Hahn, Rutherford, Seaborg and Curie.
  • The focus is specifically on transuranic elements, not on radioactivity in general or nuclear fission alone.
  • We assume standard historical accounts used in chemistry and physics education.
  • The credit sought is for discovery and systematic study of several transuranic elements.


Concept / Approach:
Glenn T. Seaborg is widely credited with the discovery or co discovery of several transuranic elements, including plutonium, americium, curium, berkelium and californium. He also proposed the actinide concept, reorganising the periodic table to place actinides in a separate series. Other scientists in the options are associated with different landmark achievements: Otto Hahn with nuclear fission, Ernest Rutherford with the nuclear model of the atom, and the Curies with radioactivity and elements like polonium and radium. Therefore, when the question is specifically about transuranic elements, Seaborg is the correct choice.


Step-by-Step Solution:
Step 1: Recall that transuranic elements are artificially produced elements with atomic numbers beyond 92.Step 2: Identify Glenn T. Seaborg as the chemist who played a central role in discovering many of these elements at the University of California, Berkeley.Step 3: Recognise that Seaborg introduced the actinide concept, which reorganised the periodic table to include the actinide series of heavy elements.Step 4: Compare with Otto Hahn, whose major contribution was the discovery of nuclear fission in uranium, not the broader set of transuranic elements.Step 5: Note that Rutherford is famous for the nuclear model and scattering experiments, while the Curies discovered polonium and radium and studied radioactivity.Step 6: Conclude that Seaborg is the scientist specifically linked to the discovery and systematisation of transuranic elements.


Verification / Alternative check:
Historical summaries of the periodic table often highlight Seaborg as a Nobel Prize winning chemist who added multiple elements to the table and changed its layout. His name is sometimes seen in connection with element 106 (seaborgium), which further commemorates his work in heavy element research. In contrast, although Hahn, Rutherford and the Curies made crucial contributions to nuclear science, they are not described as the primary discoverers of transuranic elements. This comparison confirms Seaborg as the correct answer.


Why Other Options Are Wrong:
Option a, Hahn, is associated with the discovery of nuclear fission, which enabled later work but did not by itself catalogue transuranic elements. Option b, Rutherford, laid the theoretical foundations of nuclear physics but did not focus on discovering a wide range of transuranic elements. Option d, Curie, refers to Marie or Pierre Curie, whose main contributions were the discovery of radium and polonium and the study of radioactivity. None of these scientists match Seaborg's specific role in transuranic element discovery.


Common Pitfalls:
Students sometimes pick Hahn or Curie because they strongly associate those names with nuclear science and radioactivity. Another pitfall is to overlook Seaborg because his work is more specialised compared to the more famous stories of early radioactivity. To avoid these errors, remember that the phrase "transuranic elements" should immediately bring Glenn T. Seaborg to mind, along with his work on the actinide series and the many elements he helped discover.


Final Answer:
The credit for the discovery and systematic study of transuranic elements goes to Glenn T. Seaborg.

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